Actually there are plenty! Search for 'multi laptop charger' or 'universal' or keywords that imply interchangeability. Like this randomly picked unit [1], they

Actually there are plenty! Search for 'multi laptop charger' or 'universal' or keywords that imply interchangeability. Like this randomly picked unit [1], they typically come with a voltage selector and a variety of plugs that can be switched out to fit a particular socket. Potential problems with these devices are manyfold. They won't be specialized to deliver a particular amperage [2]; the voltage selector means additional moving parts that can fail, and mainstream brands usually don't play in this space, so the quality can run the gamut from decent to sketchy to hazardous. [1] http://www.newegg.com/Product/Product.aspx?Item=9SIA6RP37N6759 http://www.newegg.com/Product/Product.aspx?Item=9SIA6RP37N67... [2] http://lifehacker.com/pay-attention-to-charger-amperage-to-juice-up-your-gadg-1492446246 http://lifehacker.com/pay-attention-to-charger-amperage-to-j...